A
production line is a set of sequential operations established in a
factory whereby materials are put through a
refining process to produce an end-product that is suitable for onward consumption; or components are assembled to make a finished article.
Typically, raw materials such as
metal ores or
agricultural products such as foodstuffs or
textile source plants (
cotton,
flax) require a sequence of treatments to render them useful. For metal, the processes include crushing,
smelting and further refining. For plants, the useful material has to be separated from husks or contaminants and then treated for onward sale.
Early production processes were constrained by the availability of a source of
energy, with wind mills and water mills providing
power for the crude heavy processes and
manpower being used for activities requiring more precision. In earlier centuries, with raw materials, power and people often being in different locations, production was distributed across a number of sites. The concentration of numbers of people in manufactories, and later the
factory as exemplified by the
cotton mills of
Richard Arkwright, started the move towards co-locating individual processes.
With the development of the
steam engine in the latter half of the
18th century, the production elements became less reliant on the location of the power source, and so the processing of goods moved to either the source of the materials or the location of people to perform the tasks. Separate processes for different treatment stages were brought into the same building, and the various stages of refining or manufacture were combined.
Oliver Evans in the
United States brought the stages of the
flour milling process together in the
1780s to form what is recognised as the first production line, with the output from one process being fed directly into the next.
With increasing use of steam power, and increasing use of
machinery to supplant the use of people, the integrated use of techniques in production lines spurred the
industrial revolutions of
Europe and the
United States. From the processing of raw materials into useful goods, the next step was the concept of the
assembly line, as introduced by
Eli Whitney. This was taken to the next stage at the
Ford Motor Company in 1913, where
Henry Ford introduced the innovation of continuously moving the cars being assempled past individual work stations.
See also
Category:Industry